Comparison of the commonly used priority number

Created: May 30, 2019 16:00:41Latest reply: May 30, 2019 17:00:01 43 1 1 1

When a priority decision is encountered, the priority number is used to judge which one is the best. But not all the priority comparision work as we thought, for some protocols the higher of the priority number is, the lower priority is. In this post, we summarized the  relationship of commonly used priority number and priority.


 

the larger number is, the

higher priority is

default

priority

number

range

stp priority

false

32768

0-61400

stp port priority

false

128

0-240

OSPF dr-priority

true

1

0-255

OSPFv3 dr-priority

true

1

0-255

route preference

false

NA

0-255

BGP prefer value(when comparing to choose route)

true

0

0-65535

BGP local-preference(when comparing to choose route)

true

100

0-4294967295

BGP MED(when comparing to choose route)

false

0

0-4294967295

BGP router-id(when comparing to choose route)

false

NA

NA

BGP peer id(when comparing to choose route)

false

NA

NA

isis dis

true

64

0-127

E-Trunk priority

false

100

1-254

vrrp vrid priority

true

100

1-254

PIM c-bsr priority

true

0

0-255

PIM c-rp priority

true

0

0-255

PIM dr-priority

true

1

0-4294967295

PIM dr-priority(interface)

true

1

0-4294967295

istack

true

100

1-255

CSS

true

100

1-255


  • x
  • convention:

Sprout     Created May 30, 2019 17:00:01 Helpful(0) Helpful(0)

The priority comparison is very easy to confuse. very good classification, Thank you for sharing
  • x
  • convention:

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